package com.sky.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordEditFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.util.StringUtils;

import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        QueryWrapper<Employee> queryWrapper = new QueryWrapper<>();
        Employee employee = employeeMapper.selectOne(new QueryWrapper<Employee>().eq("username", username));

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void insert(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);
       employeeMapper.insert(employee);
    }

    @Override
    public PageResult list(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        QueryWrapper<Employee> queryWrapper = new QueryWrapper<>();
        queryWrapper.like(StringUtils.hasLength(employeePageQueryDTO.getName()), "name", employeePageQueryDTO.getName())
                .orderByDesc("update_time");
        List<Employee> list = employeeMapper.selectList(queryWrapper);
        Page<Employee> employeePage = (Page<Employee>) list;
        return new PageResult(employeePage.getTotal(), employeePage.getResult());
    }

    @Override
    public void updateStatus(Integer status, Long id) {
//        UpdateWrapper<Employee> updateWrapper = new UpdateWrapper<>();
//        updateWrapper.set("status", status);
//        updateWrapper.eq("id", id);
//        employeeMapper.update(updateWrapper);
        Employee employee = Employee.builder().id(id).status(status).build();
        employeeMapper.updateById(employee);
    }

    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        Employee employee = employeeMapper.selectById(BaseContext.getCurrentId());
        if (employee == null) {
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        String oldPassword = passwordEditDTO.getOldPassword();
        if (!StringUtils.hasLength(oldPassword)
                || !employee.getPassword().equals(DigestUtils.md5DigestAsHex(oldPassword.getBytes()))) {
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        String newPassword = passwordEditDTO.getNewPassword();
        if(!StringUtils.hasLength(newPassword)) {
            throw new PasswordEditFailedException(MessageConstant.PASSWORD_EDIT_FAILED);
        }

        employee.setPassword(DigestUtils.md5DigestAsHex(newPassword.getBytes()));
        employeeMapper.updateById(employee);
    }

    @Override
    public Employee getById(Long id) {
        return employeeMapper.selectById(id);
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employeeMapper.updateById(employee);
    }
}
